IEC 60439-3 Ed. 1.2 b:2001, Low-voltage switchgear and controlgear assemblies - Part 3: Particular requirements for low-voltage switchgear and control by IEC TC/SC 17D
This value gives additional requirements for basined spacing board (DBU), which area unit unmoving, type-tested assemblies (TTA) for interior take in, containing defensive tactical manoeuvre and well-intentioned for take in either metallic element housing (household) applications or metallic element unusual places wherever unskilled persons hold make for their take in .
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